Concrete-building-block construction.



B. BROWNSTEIN. CONCRETE BUILDING BLOCK CONSTRUCTION. APPLICATION FILEDJUNE 21, 1912.

' Patented Nov. 18, 1913.

F G. I 2..

azizfil (QM/ML WITNESSES the slab block BENJAMIN IBROVJ'NSTEIN,

OF EL LW'OOD CITY, PENNSYLVANIA.

CONCRETE-BUILDING-BLO0K CON STRUGTION Specification of Letters Patent.Application filed June 21. 1812.

Serial No. 705,113.

To all whom it may concern.

Be it known that I, BENJAMIN Bnown- STEIN, a citizen of the UnitedStates, residingat Ellwood City, in the county of Lawrence and StateofPennsylvania, have invented new and useful Improvements in Concrete-Building-Block Construction, of which the following is a specification.

ll lv invention relates to improvements in concrete slab building blockties, so that the slab block becomes a rigid block under all conditions.

Slab blocks united by metallic ties so that the slabs are separate fromone another become water proof and which is an important factor, butthere is still factor that must be considered before can be consideredsat lsfactory as a building material, and that is rigidity in itsconstruction, for if the slab block is not rigid enough to withstanddistortion in transportation and rough dling it is not lit to be used asa building material.

When a concrete slab block is distorted, in ninety cases out of onehundred it cannot be brought back to plumbness without dethe chemicalbond the ties become loose in the slabs, and

even though there should be mechanical bonds between the ties and slabs,it is surely not very safe to build a house with loosely connectedslabs.

The construction of slab blocks with metallic ties that amount of ritosimilar parts.

In Figure 1, is a plan of a slab block and Fig. 2 the end elevation andsection of said block showing the position of the tie T and distributionof concrete in the slab through tie T Fig. 3 is a planof a cor-' anotherimportant angles to the main body of tie T inclosing the large centralaperture F. The exterior flange D and interior flange E in connectionwith main body T form a channel section which is well known for itsstrength and economy in n'iuterial.

The tie T, shown in Figs. 6 and 7 is similar to the tie T shown in Figs.4- and 5 except that the interior flange L is bent at right angles tomain body of tie T but in the opposite direction to flange D forming inconnection with main body of a 2 bar section which is equally as strongas a channel section of equal dimensions.

The tie T shown in Figs. 8 and 9 differs from the ties T and T Figs. l,5, 6 and 7 in that it has three central apertures K with three interiorflanges H I and J instead of one central aperture F with one interiorflange E Interior flanges H I and J are bent at right-angles to mainbody of tie T, and when all flanges are bentin the Same-direction formin connection with main body of tie T channel sections, and when flangesH and J are bent at rightangles to main body of tie T ut in the oppositedirection to flanges D and I form Z bar sections.

The angle tie T, shown in Figs. 10, ll, 12, and 13 is a combination oftwo ties stamped out of one piece and bent at right angles to oneanother, the sections ot this tie T, can be either channel section asshown or 2 bar section and with two or more central apertures.

The central apertures F and K and small apertures G allow a gooddistribution of concrete through tie when the tie is embedded in theslabs so that the slabs are not weakened in any ay by the insertion ofthe tie.

The ties being stamped out of one piece into channel or 2 bar sections,make a rigid construction capable of resisting bending stresses in anydirection, the flanges and apertures of the tie make a powerfulmechanical bond within the slabs andwith an extra large surface of thetie for a chemical bond between cement of slabs and tie, makes the slabblock as rigid as a solid concrete block when made by the wet processand can withstand pretty rough handling Witlinn Patented Nov. i 8, 1 P113.

distorting the slabs AA in the least in any direction from their truerelation to one another. I

What I claim and desire to secure by Letters Patent is Y 1. A tie forbuilding blocks comprising a plate having openings therein, a flangelocated upon the perimeter of saidplate and flanges surrounding each ofsaid openings, the flanges adapted to anchor the tie in the material ofthe blocks as well as to stiffen the tie.

2. A tie for spaced slab building blocks comprising a platehavingopenings therein, a flange upon the perimeter of the plate and a flangesurrounding each of said openings,

' flanges and openings said flanges projecting from alternate sides ofthe plate, said flanges and openings serving to interlock said tie withthe material of the slab. v

3. A tie for building blocks comprising a plate bent at an angle andhaving openings, a flange upon the perimeter of the tie, flangessurrounding each of said openings, sai

adapted to anchor the tie in the material of the blocks. In testimonywhereof I hereunto afiix my signature in presence of two witnesses.

BENJAMIN BROW'NSTEIN.

Witnesses:

PAUL Fnannn LUTHER, WILLIAM BRowNs'rnrn.

